How do you convert from a mole percent to a mass percent? Lets say I have 50mol% Benzene, how to I make it into a mass/weight%
Multiply the mol percent by the relative mass and this gives you the proportion by mass of each element in the compound. Then change to percentage by 100 x mass/total mass.
Example Benzene :
50% (50/100) by mol carbon = 0.5 x 12 = 6 mass units Hydrogen is 50% (50/100) by mol = 0.5 x 1 = 0.5 mass units
this gives you a ratio of 6 : 0.5 or 12:1
Hence percentage carbon = 100 x 12/13 = 92.3% Hence percentage hydrogen = 100 x 1/13 = 7.7%
Multiply the mol percent by the relative mass and this gives you the proportion by mass of each element in the compound. Then change to percentage by 100 x mass/total mass.
Example Benzene :
50% (50/100) by mol carbon = 0.5 x 12 = 6 mass units Hydrogen is 50% (50/100) by mol = 0.5 x 1 = 0.5 mass units
this gives you a ratio of 6 : 0.5 or 12:1
Hence percentage carbon = 100 x 12/13 = 92.3% Hence percentage hydrogen = 100 x 1/13 = 7.7%
Thank you. What if it is a mixture solution. The mixture is made up of benzene and ethane, both with 50mol%, so in this case, it's the benzene + ethane that makes up the 100%. Do I just do: Benzene = 0.5 x 78 = 39 mass units Ethane = 0.5 x 30 = 15 mass units
Thank you. What if it is a mixture solution. The mixture is made up of benzene and ethane, both with 50mol%, so in this case, it's the benzene + ethane that makes up the 100%. Do I just do: Benzene = 0.5 x 78 = 39 mass units Ethane = 0.5 x 30 = 15 mass units